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Monitoring

 

The Clean Air Act establishes standards to protect the public and the environment from adverse health and welfare effects of air pollution. These standards, National Ambient Air Quality Standards (NAAQS), define the maximum permissible concentrations for certain pollutants, known as criteria pollutants.

NAAQS currently exist for six criteria pollutants: carbon monoxide (CO), lead (Pb), nitrogen dioxide (NO2), ozone (O3), sulfur dioxide (SO2), and particulate matter (PM). There are two categories of PM, particulate matter less than 10 micrometers (PM-10) and particulate matter less than 2.5 micrometers (PM-2.5).

A network of air quality monitoring stations routinely measures concentrations of the criteria air pollutants in the ambient air. To see the monitor locations and the types of pollutants monitored at each site, use the GPS map here. Air quality monitoring data for 2013 is now posted in the 2013 Air Data Report. This year's report includes a section on speciation of particulate matter. Earlier reports are still available: 2012 Air Data Report, 2011 Air Data Report, 2010 Air Data Report.

Page last updated: July 3, 2014
 

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